Just got my LCD-2 yesterday. Running them off a Schiit Bifrost (USB) + Lyr (JJ E88CC) and it's not bad at all.
Frankly, I don't know if it's $700 better than the AKG-K701's I had been using - maybe I just need time to adjust...
I also have two other pairs of tubes for the Lyr I bought at the same time from Schiit but haven't used yet. That could also change things.
WTH? Stock JJ's are the worst possible tubes you could run. Replace those asap.